I've had it since it was released. Runs perfectly fine. Using the default settings. Putting the shadowing snd stuff to full slows the computer down a bit. I love it. Runs great. I have the first intel iMac. It's not even C2D.
I run at the 1280 x ws resolution. Most graphics on medium.. some on high and AA turned off. Looks pretty good. Comp has restarted a few times from it.. but overall no big deal. Runs great.